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SmartElex HX711 Load Cell Amplifier - High Precision Weight Sensor Module

SmartElex HX711 Load Cell Amplifier - High Precision Weight Sensor Module

β‚Ή121.00Price
βš–οΈ HX711 Load Cell Amplifier (SmartElex)
🧩 Overview
  • High-precision load cell amplifier + ADC module
  • Based on HX711 24-bit Analog-to-Digital Converter
  • Converts tiny load cell signals β†’ digital data
  • Essential for building digital weighing systems
  • Compatible with Arduino, ESP32, Raspberry Pi
βš™οΈ Working Principle
  • Load cell (strain gauge) produces very small analog signal (mV)
  • HX711 amplifies signal using PGA (Programmable Gain Amplifier)
  • Converts signal into 24-bit digital data
  • Microcontroller reads data via 2-wire interface (DOUT & SCK)
πŸ‘‰ Eliminates need for external amplifier circuits
πŸ“Š Key Specifications
  • πŸ”Ή ADC Resolution: 24-bit (high precision)
  • πŸ”Ή Operating Voltage: 2.7V – 5V
  • πŸ”Ή Current Consumption: < 1.5 mA
  • πŸ”Ή Data Rate: 10 SPS / 80 SPS selectable
  • πŸ”Ή Gain Options: 32, 64, 128
  • πŸ”Ή Input Channels: 2 differential channels (A & B)
  • πŸ”Ή Output Type: Digital (2-wire serial)
  • πŸ”Ή Noise Rejection: 50Hz & 60Hz filtering
πŸ”Œ Pin Configuration
πŸ”Ή To Microcontroller
  • 🟑 DT (DOUT) β†’ Data output
  • 🟒 SCK (CLK) β†’ Clock
  • πŸ”΄ VCC β†’ 3.3V / 5V
  • ⚫ GND β†’ Ground
πŸ”Ή To Load Cell
  • πŸ”΄ E+ β†’ Excitation +
  • ⚫ E- β†’ Excitation –
  • 🟒 A+ β†’ Signal +
  • βšͺ A- β†’ Signal –
πŸ”„ Features
  • Ultra-high resolution (24-bit ADC)
  • Built-in Programmable Gain Amplifier (PGA)
  • Supports dual channel input
  • Low noise & stable readings
  • Simple 2-wire communication interface
  • Low power consumption
πŸ› οΈ Applications
  • Digital weighing scales βš–οΈ
  • Smart kitchen scales 🍽️
  • Industrial weight measurement 🏭
  • Force measurement systems
  • Tank / hopper level monitoring
  • IoT-based weight monitoring πŸ“Š
⚠️ Usage Tips
  • Always calibrate using known weights
  • Place HX711 close to load cell to reduce noise
  • Use shielded wires for better accuracy
  • Avoid vibration and external interference
  • Use averaging/filtering in code
βœ… Advantages
  • Very high precision (24-bit)
  • Low cost and widely available
  • Easy integration with microcontrollers
  • Stable readings with noise rejection
⚠️ Limitations
  • Requires calibration for accurate weight
  • Slower sampling compared to some ADCs
  • Sensitive to electrical noise
  • Needs proper wiring (Wheatstone bridge)
πŸ” Summary
  • A high-precision load cell amplifier module
  • Converts mV signals β†’ digital weight data
  • Uses HX711 24-bit ADC with PGA
  • Ideal for DIY weighing scales and measurement systems
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